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Understanding The Importance Of The Pigtail Line On A Tractor Trailer
When you are driving a tractor trailer, there are many things you need to know to ensure proper operation of this large vehicle. Along with making sure that the vehicle is in tip top working order, everything that needs to be connected to make sure the truck is supplying the trailer with electricity, among other things. A pigtail is the connection that goes from the truck to the trailer to allow for electrical power.
The pigtail connector, so named because it resembles a pigs tail, is only one component of all the connections that need to be made. However, it is the connection that supplies all the electrical needs to the trailer. The coil in the cable allows the truck to turn without the cable being disconnected.
The pigtail is attached from the back of the tractor to a trailer with a green cable. The part that is to be attached is called the female plug and it is connected to the male outlet. It is mounted on the back of the tractor and is a static connection.
The pigtail line is approximately two to three feet long when it is uncoiled. When the vehicle is moving, the coils allow for the truck to make turns without the connections coming disconnected. If an operator is traveling and notices in his mirrors that there are no lights on the trailer, then more than likely the pigtail has been disconnected.
The electrical mechanism is hardwired to the back of a tractor, most times on the passenger side of the cab. The current comes from the alternator, and is directed to this mechanism that is attached to the static end of the pigtail line. This is how the electrical power is brought to a trailer.
With a trailer supplied with power, this ensures that the running lights and brake lights will be operational while the truck is moving. It will also supply lighting to the inside of the trailer. It is very dangerous to operate a tractor and trailer without it being properly lit.
Those who drive these vehicles for a living are very aware of how to attach the trailer to the cab. The safe operation of a big vehicle like this is a most important aspect of this job. The pigtail line and its proper attachment is critical to ensure the proper lighting on the trailer.
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Philatron Wire and Cable is my top recommendation for air brake coiled hoses and 7-way coiled power cables. They have been manufacturing heavy-duty trucking cords and cables in the USA for decades, and are innovators in the field. They manufacture cords and cables to your custom specifications.
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